Elevator safety-stop.



s. IIIAHEII.

ELEVATOR SAFETY STOP.

APPLICATION FILED 1uLYI3,I9Is.

1,206,566, `Imntea Nov. 28,1916.

fif/

his NnliRls FETKRS nu, PNomLlrno.. WASHING ruw D. C.

SOLOVON MAHER, OF NORTH ADAMS, IvlSSAC1lilTJSLEWXSA `ELEVATOB SAFETY-STOR i posses.

Application filed July 13, 1916.

To all fr0/0m t may concern f lle it known that l, SOLOMON MAHER, a subject of the Sultan oit Turkey, residing at Yorth Adonis, in the county oit Berkshire and Stato of li/iassachusetts, have invented certain ner' and useful linproyenients in Elevator Safety-Stops; and l do declare the ollou'ing' to be a full. clear, and exact description of the invention, such as Will enable others skilled in the art to Which it` appertains to nialce and use the same. Y

This invention relates to neuY and useful ixngnn'orements in eleyators, and more particularly to elevators operated by a hoisting cable and the primary object of the invention to provide an elevator of this character with a safety device whereby upon lrealiage ot the cableal the elevator" will be instantly stopped.

Another object ot the invention is to provide a device of this character which is easily and simply constructed; inexpensivel to manufacture and one which will be Very in operation.

il? ith these and nunierous other objects in View the invention consists of the novel features oi' construction, combination and arrr-ngenient oi parts u'hich-Will'be herein reterred to and incre particularly pointed out in the specilication and claims.A

ln the accompanying' drawings: Figure l s a side elevation of the elevator showing he support of the saine partly in section; a top plan vieu' of the elevator with l di'. 3 is a detail perspective of the ,Y nie in which the end of the cable holder is uiounted.

n describing;` my invention I shall refer to. the drawings in -which similar reference characters designate corresponding parts throughout the several Views and in which the numeral l designates the elevator, which is provided with a top 2 and sides 3,the sides beine; provided with substantially U-shaped des l which are adapted to engage the sid et a raclrbar 5 positioned in the elevator shaft adjacent the sides of the saine.A

My improved safety device is attached to the top E2 ol' the elevator7 and consists of a traine Y which is provided with spider arms 8 secured at their lower ends to the top of the elevator, on which is preferably posi-r tioned a met-al strip as clearly shown in 55 Figs. l and 3 of `the drawings. The flat upper portion of the traine 7 is disposed Specification of Letters Patent.

Patented Non. 23, i916.

Serial No. 109,116.

The lower ena ot the hoisting' cable l1 is adapted to projecty through the opening l0 J! r or the top oit the traine7 and is secured to a cable holder l2 positioned below the top of the traine but which has secured to its lower ends a plate 13 that is apertured adjacent its ends and which is adapted to slidably engage the standards 9. rlie cable holder l2 is of a height less than the distance between the fiat portion. of the traine and the topVV of the elevator and consequently the saine is `slida-Y bly mounted on these standards Within the frame. @oiled springs surround the portion of the standard.C be een the top of the iframe and the plate lrl. lWhen this elevator is in operation the sliding plate 13 secured to the bottoni of the cable holderwill be positioned substantially as shown in Fig. l ot the drawings.y and consequently the coil springs lt- Will be compressed.

Secured to the bottoni of the plate 13 at a ioint intermediate its cnds is a 'dat spring' portions i6? through which the standards?) are positioned, and the said flat spring' projects outwardly through the arnis ol the frame T.. and has positioned abore the same rollers ll' journaled on the top of the ele rater. These rollers l? are positioned adiacentthe ends of the dat spring l5, and consequently when this spring' is in position and the elevator is in operation it will be bowed at its central portion that is the portion between the rollers l?. IThese rollers 17 are j ournaled in bearings 18 secured to the upper surface oi the top of the eleyator.

lt Will be o yious that owing to the 'fact that the cable holder and plate are slidably mounted Within the traine, and tl e llat spring is secured to said plate upon Vertical movement of these parts, the ends of the flat spring that project past the rollers l? will inoye horizontally. Secured to these ends which are designated by the numerals i9 are bloclrs Q0 which are consequently slidable horizontally on the top of the elevator. The

ends 19 of the springs are positioned lin sockets in the inner sides of the blocks 20 and are held 1n rigid engagement ther v'th by bolts 21.

Securely mounted on the top of the elelo, which is provided 'with elongated slotted Y ice vator adjacent the sides of the same are guides 22 in which are slidably mounted bolts 23 adapted to slide freelyV therethrough. These bolts and guides 22 and 23 are positioned adjacent each side of the elevator at the top of the same and projecting rearwardly from the inner ends of the bolts are pairs of rods 24 which connect said bolts with the outer faces of the sliding blocks 20. Secured to the top of the elevator at a point between the inner ends of the bolts and the blocks 20 is a stationary plate 25, which is apertured so that the rods 2li are adapted to slide freely therethrough. '.lhe portions of the rods 2d between the plate 25 and the inner ends of the bolts are surrounded by coiled springs 26. rlhese coiled springs 26 are normally compressed when the elevator is being operated and the flat spring is bowed, consequently they will exert a constant outward tension on the inner ends of the bolts 23.

As the elevator is being operated the parts of the safety device are positioned as clearly shown in Fig. l of the drawings, and it will be clear that the fiat spring will be bowed, and its central portion will be elevated against the tension of the coiled springs la with the frame 7. This bowing of the spring will also draw the bolts 23 into the guides 22 and also against the pressure of the coiled springs 26, and the said bolts also disposed out of engagement with the rack bars 5 on the sides of the elevator therefor. Upon breakage of the cable ll, the flat spring from its own tension, and also actuated by the expansion of the coil springs la will have its flat portion forced downwardly fiat against the top of the elevator, and consequently the ends of the spring will be forced outwardly thereby releasing the bolts 23, and forcing them outwardly, this movement being further actuated by the expansion vof the coiled springs 2G. The bolts 23 will conf se.uentlv be forced into engagement with (i .i :s e

the rack bars 5 and the elevator' will be instantly stopped.

rlhe above described safety device aords a very simple and eflicient means for automatically applying a stop to an elevator of this character when the hoisting cable accidentally breaks. Owing to the spring tensions above described, the safety means will immediately and instantly act and the stop mechanism will be applied without fail. This safety attachment is especially applicable for use on dumb waiters and elevators of like character, as the eXtreme simplicity of the construction employed, enables the device to be economically manufactured and to be cheaply applied to elevators of this character.

I claim:

l. The combination with an elevator mounted in a shaft, a hoisting cable, rack bars secured to the opposite sides of said shaft, of a spring pressed cable holder slidably mounted on the elevator, a flat spring on the elevator connected intermediate its ends with said holder and bowed thereby,

guides on the elevator adjacent its sides,

bolts slidably mounted in said guides, rollers positioned above said fiat sp "ing adjacent its ends, blocks on the ends of said spring, inwardly projecting rods connecting the inner ends of said bolts with the blocks, stationary perforated plates through which the rods are adapted to slide, and coiled springs surrounding the rods between the plates and the inner ends of said bolts.

2. The combination with an elevator mounted in a shaft, a hoisting cable, rack bars secured to the opposite sides of said shaft, of a frame having downwardlyV projecting arms secured to the top of the elevator, ay pair of upright standards in said frame, a plate slidably mounted in the frame on the standards, coiled springs surrounding said standards between the plate and the upper end of the frame, a cable holder secured to said plate and adapted to normally hold the same against the compression of the coiled springs, a fiat, spring on the elevator secured to the plate and projecting fromr between the arms of the frame, and bolts slidably mounted on the elevator adj acent its sides connected with the ends of said fiat spring.

3. The combination of an elevator mounted in a shaft, a hoisting cable, rack bars secured to the opposite sides of said shaft; of a pair of upright standards on said elevator, a cable holder slidably mounted on said standards, coiled springs surrounding the standards and normally compressed by the holder when the cable is taut, a flat spring on the elevator connected with the cable holder, and bolts operated by the ends of the said spring adapted for engagement with the rack bars should the cable break.

ln testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

SOLOMON MAHER. Witnesses:

RUDOLPH H. Borne, EDWIN BARNARD.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

